Abstract
A redescription is given of Raphidascaris gigi Fujita, 1928 based on newly collected specimens from the intestine of masu salmon Oncorhynchus masou (Brevoort) in the Kinu River in Japan. The species is characterised by the absence of interlabia and lateral alae, by the presence of lips without lateral membranous flanges and by numerous pre-anal and postanal papillae in the male. Although the general morphology of this species resembles that of Ichthyascaris spp. as defined by Bruce (1990), who transferred R. biwakoensis (= R. gigi) to this genus, the absence of the alae uniting close the ventrolateral lips shows clearly that it belongs to Raphidascaris Railliet & Henry, 1915. Ichthyascaris Wu, 1949 is here considered a subgenus of Raphidascaris, and two species described in the former genus are transferred to the latter as R. gymnocraniae (Bruce, 1990) n. comb. and R. sillagoides (Bruce, 1990) n. comb. The finding of R. gigi in O. masou represents a new host record.
This is a preview of subscription content, log in via an institution to check access.
Similar content being viewed by others
References
Bruce, N.L. (1990) Hysterothylacium Ward and Magath, 1917, and Ichthyascaris Wu, 1949, ascaridoid nematodes from Australian demersal fishes. Memoirs of the Queensland Museum, 28, 389–426.
Bruce, N.L., Adlard, R.D. & Cannon L.R.G. (1994) Synoptic checklist of ascaridoid parasites (Nematoda) from fish hosts. Invertebrate Taxonomy, 8, 583–674.
Eschmeyer, W.N. (Ed.) (1998) Catalog of fishes. Parts 1, 2, 3. San Francisco: California Academy of Sciences, 1820 pp.
Fujita, T. (1928) Further studies on nematodes from fishes of Lake Biwa. Dobutsugaku Zasshi, 40, 303–314. (In Japanese, English summary).
Kataoka, N. & Momma, K. (1932) A certain nematode parasitic in Leptodora kindti from Japan. Dobutsugaku Zasshi, 44, 323–326. (In Japanese, English summary).
Kataoka, N. & Momma, K. (1934) Helminthes from the salmonoid fish, Plecoglossus altivelis T. & S. Bulletin of the Japanese Society of Scientific Fisheries, 3, 59–64.
Moravec, F. (1971) Nematodes of fishes in Czechoslovakia. Acta Scientiarium Naturalium Academiae Scientiarum Bohemoslovacae Brno, 5, 1–49.
Moravec, F. (1994) Parasitic nematodes of freshwater fishes of Europe. Prague and Dordrecht, Boston, London: Academia and Kluwer Academic Publishers, 473 pp.
Moravec, F. & Nagasawa, K. (1989) Observations on some nematodes parasitic in Japanese freshwater fishes. Folia Parasitologica, 36, 127–141.
Moravec, F., Nagasawa, K., Tanaka, Y. & Narita, T. (1998) Role of Leptodora kindti (Cladocera: Leptodoridae) in the life cycle of Raphidascaris biwakoensis (Nematoda: Anisakidae), a fish parasite in Lake Biwa, Japan. Diseases of Aquatic Organisms, 32, 157–160.
Mozgovoy, A.A. (1953) [Ascaridata of animals and man and the diseases caused by them.] Osnovy Nematodologii. Moscow: Academiya Nauk, Vol. 2, 616 pp. (In Russian).
Smith, J.D. (1984) Taxonomy of Raphidascaris spp. (Nematoda, Anisakidae) of fishes, with a redescription of R. acus (Bloch, 1772). Canadian Journal of Zoology, 62, 685–694.
Yamaguti, S. (1935) Studies on the helminth fauna of Japan. Part 9. Nematodes of fishes. 1. Japanese Journal of Zoology, 6, 337–386.
Yamaguti, S. (1941) Studies on the helminth fauna of Japan. Part 33. Nematodes of fishes. 2. Japanese Journal of Zoology, 9, 343–396 +pls iv-vi.
Yamaguti, S. (1961) Systema helminthum. Vol. 3. The nematodes of vertebrates. Parts 1, 2. New York, London: Interscience Publishers, 1261 pp.
Author information
Authors and Affiliations
Rights and permissions
About this article
Cite this article
Moravec, F., Nagasawa, K. Redescription of Raphidascaris gigi Fujita, 1928 (Nematoda: Anisakidae), a parasite of freshwater fishes in Japan. Syst Parasitol 52, 193–198 (2002). https://doi.org/10.1023/A:1015785602488
Issue Date:
DOI: https://doi.org/10.1023/A:1015785602488